<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
{#姓名: {{ name|upper }}#}
{#姓名: {{ name|lower }}#}
{#姓名: {{ name|title }}#}
{#姓名: {{ name|title }}#}
姓名: {{ name|lower|add:'xxx' }}
</body>
</html>